var toc = document.getElementById('toc')

if (toc != null) {
	window.addEventListener("scroll", scrollcatelogHandler);
	var tocPosition = toc.offsetTop;
	var height_header = $("#signature").height();

	function scrollcatelogHandler(e) {
		var event = e || window.event,
			target = event.target || event.srcElement;
		var scrollTop = document.documentElement.scrollTop || document.body.scrollTop;
		if (scrollTop > tocPosition - 60) {
			toc.classList.add("toc-fixed");
		} else {
			toc.classList.remove("toc-fixed");
		}
	}
}